Rev Author Line No. Line
1861 kaklik 1 #include "reflow.h"
1960 kaklik 2 #include "process.h"
1861 kaklik 3 #include <math.h>
4  
5 // nastaveni teplot a casu
6 #define TEPLOTA_PREDEHREVU 120
7 #define DOBA_PREDEHREVU 60
8  
2318 kaklik 9 #define TEPLOTA_VRCHOLU 216
1861 kaklik 10 #define DOBA_VRCHOLU 5
11  
12 // CPU IO rozhrani
13 #define LCD_RS PIN_C1 // rizeni registru LCD displeje
14 #define LCD_E PIN_C2 // enable LCD displeje
15 #define LCD_DATA_LSB PIN_D0 // data LCD
16 #include "lcd.c"
17  
18 #define TL1 PIN_B3 // tlacitko S1
19 #define TL2 PIN_B2 // tlacitko S2
20 #define TL3 PIN_B1 // tlacitko S3
21 #define TL4 PIN_B0 // tlacitko S4
22  
1963 kaklik 23 #define POWER_T3 PIN_C4 // ovladani optotriaku T3
24 #define POWER_T4 PIN_C5 // ovladani optotriaku T4
25 #define POWER_T5 PIN_C6 // ovladani optotriaku T5
1861 kaklik 26  
27 #define ADC_PIN PIN_A0 //info, nelze menit - pin pouzit jako input analog
28 #define ADC_PIN_NC PIN_A1 //info, nelze menit - pin pouzit jako input analog
29 #define REF_PIN PIN_A3 //info, nelze menit - pin pouzit jako input reference 2.5V
30  
31 // interni
32 #define PowerOn() output_low(POWER_T4);output_low(POWER_T5)
33 #define PowerOff() output_high(POWER_T4);output_high(POWER_T5)
34  
35 // globalni promenne
36 struct time
37 {
2008 kaklik 38 volatile signed int8 hod;
39 volatile signed int8 min;
40 volatile signed int8 sec;
1861 kaklik 41 }cas;
42  
1960 kaklik 43 unsigned int top_heat_power=0; // range 0-200% nad 100% je ale teleso jiz pretizene
44 unsigned int bottom_heat_power=0; // contains heating power range 0-100%
45 unsigned int period;
46  
47 float temp_last=0;
2007 kaklik 48 float temp_slope=0;
1960 kaklik 49  
2007 kaklik 50  
1960 kaklik 51 void GeneralCpuInit() // inicializace
1861 kaklik 52 {
53 output_high(POWER_T4);
54 output_high(POWER_T5);
55 port_b_pullups(true);
56  
57 setup_psp(PSP_DISABLED);
58 setup_spi(SPI_SS_DISABLED);
59  
2008 kaklik 60 setup_timer_0(RTCC_INTERNAL|RTCC_DIV_64); //nepouzit
1960 kaklik 61 setup_timer_1(T1_INTERNAL|T1_DIV_BY_1); // rizeni
1861 kaklik 62 setup_timer_2(T2_DIV_BY_16,249,10); //rtc 40ms
63  
64 setup_comparator(NC_NC_NC_NC);
65 setup_vref(FALSE);
66  
67 enable_interrupts(GLOBAL);
68 enable_interrupts(INT_TIMER2);
2008 kaklik 69 enable_interrupts(INT_TIMER0);
1861 kaklik 70  
71 setup_adc_ports(AN0_AN1_VSS_VREF); //A0 vstup cidla, A1 nepozit, A3 - ref. 2.5V
72 setup_adc(ADC_CLOCK_DIV_8);
73 SET_ADC_CHANNEL(0); //AN0, PIN_A0
74 }
75  
1963 kaklik 76 void heat_failure() // exception in case of heating fail
77 {
2007 kaklik 78 top_heat_power=0;
79 bottom_heat_power=0;
80  
1963 kaklik 81 lcd_gotoxy(1,2);
82 printf(lcd_putc,"HEATING FAILURE!");
83  
84 while(true);
85  
86 }
87  
2007 kaklik 88 unsigned int16 adc(void) // adc read and filtering
1861 kaklik 89 {
90 unsigned int16 analog;
91 unsigned int8 a;
92  
93 analog = 0;
94 for (a=0;a<32;a++)
95 {
96 analog += read_adc();
97 delay_us(50);
98 }
99 return (analog >> 5 ); // prumer = analog/32
100 }
101  
2007 kaklik 102 float teplota(void) // temperature measuring
1861 kaklik 103 {
2007 kaklik 104 return (0.674201*adc() - 294.35); // temperature calculaton (linear aproximation)
1861 kaklik 105 }
106  
1960 kaklik 107 void top_heating()
108 {
1963 kaklik 109 if (period < top_heat_power){
1960 kaklik 110 output_low(POWER_T4);
111 output_low(POWER_T5);
112 }
113 else{
114 output_high(POWER_T4);
115 output_high(POWER_T5);
116 }
117 }
1942 kaklik 118  
1960 kaklik 119 void bottom_heating()
120 {
121  
1963 kaklik 122 if (period < 2*bottom_heat_power){
1960 kaklik 123 output_low(POWER_T3);
124 }
125 else{
126 output_high(POWER_T3);
127 }
128 }
129  
2008 kaklik 130 #int_TIMER0
1960 kaklik 131 void heating_control() //rizeni topnych teles pri preteceni casovace
132 {
2007 kaklik 133 float temp;
134  
1963 kaklik 135 top_heating();
136 bottom_heating();
2007 kaklik 137  
138  
2009 kaklik 139 if ((period == 100) || (period == 0))
2008 kaklik 140 {
141 temp=teplota();
2009 kaklik 142 temp_slope=(temp - temp_last) /(100.0*256.0/62500.0); // vypocet strmosti narustu teploty ve stupnich/s
2008 kaklik 143 temp_last = temp;
2009 kaklik 144 printf("%02u %02u %3.3f \r\n",cas.min,cas.sec,temp); //vypis pro zaznam profilu
2008 kaklik 145 }
146  
2007 kaklik 147 if (period < 200) period++;
1963 kaklik 148 else period=0;
1960 kaklik 149 }
150  
1861 kaklik 151 #int_TIMER2
152 void Rtc(void) //40ms
153 {
154 static unsigned int8 ms40=0;
155 struct time* time;
156  
157 time=&cas;
158 if ( ++ms40 < 25) return;
159  
160 ms40=0;
161 if (++(time->sec) >= 60)
162 {
163 time->sec=0; //1min
164 if (++(time->min) >= 60)
165 {
166 time->min = 0; //1hod
167 (time->hod)++;
168 }
169 }
170 }
171  
1960 kaklik 172 void slope_control(float ramp, unsigned int balance) // P proporcionalni rizeni narustu teploty predpoklada periodicke volani 1x/s
173 {
174 float slope_deviation;
175  
2007 kaklik 176 slope_deviation = temp_slope - ramp; // vypocet strmosti a odchylky od pozadovane strmosti
1960 kaklik 177  
1963 kaklik 178 if(slope_deviation < 0)
179 {
2074 kaklik 180 top_heat_power= 60 + balance;
2008 kaklik 181 bottom_heat_power= 100;
1963 kaklik 182 }
183 else{
184 top_heat_power=0;
185 bottom_heat_power=0;
186 }
1960 kaklik 187 }
188  
189 void level_control(float level) // P proporcionalni rizeni teploty
190 {
1963 kaklik 191 if (teplota() > level)
192 {
193 top_heat_power=0;
194 bottom_heat_power=0;
195 }
196 else
197 {
198 top_heat_power=70;
199 bottom_heat_power=80;
200 }
1960 kaklik 201 }
202  
203  
1861 kaklik 204 void nullcas(struct time* time)
205 {
206 disable_interrupts(INT_TIMER2);
207  
208 time->sec=0;
209 time->hod=0;
210 time->min=0;
211  
212 enable_interrupts(INT_TIMER2);
213 }
214  
1960 kaklik 215 void reflow_solder()
1861 kaklik 216 {
1960 kaklik 217  
1963 kaklik 218 struct time process_time;
219  
2008 kaklik 220 // ------------------- PREHEAT ---------------------
2007 kaklik 221  
1960 kaklik 222 nullcas(&cas);
1963 kaklik 223 lcd_gotoxy(1,2);
224 printf(lcd_putc,"PREHEAT");
2009 kaklik 225 printf("#PREHEAT\r\n");
1960 kaklik 226  
227 do {
228 slope_control(PREHEAT_SLOPE, 0); // hlida strmost predehrevu
229  
230 lcd_gotoxy(1,1);
231 printf(lcd_putc,"%3.1f\21C ",teplota());
232  
2007 kaklik 233 lcd_gotoxy(12,1);
234 printf(lcd_putc,"%02u:%02u",cas.min,cas.sec);
1960 kaklik 235  
2007 kaklik 236 lcd_gotoxy(10,2);
237 printf(lcd_putc,"%1.1f\21C/s ",temp_slope);
238  
2008 kaklik 239 delay_ms(200);
1963 kaklik 240 if (cas.min>3) heat_failure();
1960 kaklik 241 }
242 while (teplota() < SOAK_TEMP);
243  
2008 kaklik 244 // ----------- SOAK ---------------
1960 kaklik 245 nullcas(&cas);
1963 kaklik 246 process_time.min = SOAK_TIME/60;
247 process_time.sec = SOAK_TIME - process_time.min*60;
2008 kaklik 248  
249 lcd_clr();
1963 kaklik 250 lcd_gotoxy(1,2);
251 printf(lcd_putc,"SOAK ");
2074 kaklik 252 printf("#SOAK\r\n");
1963 kaklik 253  
254 while (process_time.sec!=0 || process_time.min!=0)
1960 kaklik 255 {
256 level_control(SOAK_TEMP);
257  
258 lcd_gotoxy(1,1);
259 printf(lcd_putc,"%3.1f\21C ",teplota());
260  
1963 kaklik 261 if ((process_time.sec = process_time.sec - cas.sec)<0) process_time.sec=59;
262  
263 process_time.min = (SOAK_TIME - cas.min*60 - cas.sec)/60;
264 process_time.sec = (SOAK_TIME - cas.min*60 - cas.sec) - process_time.min*60;
265  
1960 kaklik 266 lcd_gotoxy(9,1);
2008 kaklik 267 printf(lcd_putc,"%02u:%02u", process_time.min, process_time.sec);
268 delay_ms(200);
1960 kaklik 269 }
270  
2008 kaklik 271 //----------------- solder ----------------------------
272  
273 nullcas(&cas);
274 lcd_clr();
275 lcd_gotoxy(1,2);
276 printf(lcd_putc,"SOLDER");
2009 kaklik 277 printf("#SOLDER\r\n");
2008 kaklik 278  
279 do {
280 slope_control(SOLDER_SLOPE, 10); // hlida strmost predehrevu
281  
282 lcd_gotoxy(1,1);
283 printf(lcd_putc,"%3.1f\21C ",teplota());
284  
285 lcd_gotoxy(12,1);
286 printf(lcd_putc,"%02u:%02u",cas.min,cas.sec);
287  
288 lcd_gotoxy(10,2);
289 printf(lcd_putc,"%1.1f\21C/s ",temp_slope);
290  
291 delay_ms(200);
2009 kaklik 292 if (cas.min>2) heat_failure();
2008 kaklik 293 }
294 while (teplota() < SOLDER_TEMP);
295  
296 // ---------------- TAO ------------------------
297  
298  
299 while (process_time.sec!=0 || process_time.min!=0)
300 {
301 level_control(SOLDER_TEMP);
302  
303 lcd_gotoxy(1,1);
304 printf(lcd_putc,"%3.1f\21C ",teplota());
305  
306 if ((process_time.sec = process_time.sec - cas.sec)<0) process_time.sec=59;
307  
308 process_time.min = (SOLDER_TIME - cas.min*60 - cas.sec)/60;
309 process_time.sec = (SOLDER_TIME - cas.min*60 - cas.sec) - process_time.min*60;
310  
311 lcd_gotoxy(9,1);
312 printf(lcd_putc,"%02u:%02u", process_time.min, process_time.sec);
2009 kaklik 313  
2008 kaklik 314 delay_ms(200);
315  
316 }
317  
318 // ---------------- COOLING ------------------------
319  
320 top_heat_power=0;
321 bottom_heat_power=0;
322  
323 lcd_clr();
324  
325 lcd_gotoxy(1,2);
326 printf(lcd_putc,"REFLOW COMPLETE");
2009 kaklik 327 printf("COOLING \r\n");
328  
329  
2008 kaklik 330 while(true)
331 {
332 lcd_gotoxy(1,1);
333 printf(lcd_putc,"%3.1f\21C ",teplota());
334  
335 lcd_gotoxy(10,1);
336 printf(lcd_putc,"%1.1f\21C/s ",temp_slope);
337 }
1960 kaklik 338 }
339  
340 void main() // main loop
341 {
1861 kaklik 342 GeneralCpuInit();
343 PowerOff();
344  
345 lcd_init();
346 lcd_define_char(1,LCD_CHAR_STUPEN);
1942 kaklik 347  
1861 kaklik 348 nullcas(&cas);
349  
1942 kaklik 350 while(true)
351 {
1963 kaklik 352 delay_ms(300);
1960 kaklik 353 reflow_solder();
354  
1942 kaklik 355 }
1861 kaklik 356 }